Wow, those responses you gave him were spot on MB.
You really are getting the hang of stepping OUT of an argument... It's a talent.. its VERY addictive to dive right in and take the opposing side...
As soon as you hear 'were just friends' I am sure you want to blast him with all the evidence you can throw at him... it's pointless...
The most effective way to combat an argument during an affair is to WALK AWAY FROM IT
KIDS try this, they argue with their parents, especially when in teens... Parents learn the talent of NOT ENGAGING... when you argue, you DIGNIFY the subject... make it worth a discussion...
His affair is NOT worth that... so don't discuss it... you have it down...
WELL DONE.. now go to your safety zone and wait out the storm